Though question, I only read some reviews.
If I had to pick from the one of those, I think I'd go for the Sony, just because it feels like a safer choice. It's hard to conclude anything from the reviews. Both the cams have their weak and strong points, but I think that for anybody who's into these kind of cams, the weak points won't really be noticable.
The Casio seems to produce good pictures too btw... I just never liked Casio except for their calculators. I somewhere read that Casio cams are quite durable, so if that's true I think they are both a good choice and the decision would have to be made on personal preferences.
Minolata and Pentax have similar cams btw and they produce about the same quality.
(I always wondered why anybody would want such a cam... way too small to handle)